Telephone headset amplifier unit



FIG. 1 is a perspective view of a telephone headset amplifier unitshowing the present invention;

FIG. 2 is a left side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is the perspective view of FIG. 1 including a desktop telephoneshown on top of the amplifier unit, the desktop telephone is shown inbroken lines for illustrative purposes only and forms no part of theclaimed design.

The ornamental design for telephone headset amplifier unit, as shown anddescribed.